Electrical switch.



H. R. GILSON.

ELECTRICAL SWITCH.

f APPLICATION FILED APR.1,191L 1,064,318, Patented June 10, 1913.

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UNITED STATES PATENT oEEIoE.

HENRY R. GILSON. OF BEAVER, PENNSYLVANIA, ASSIGNOR TO NATIONAL METALMOLDING COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRICAL SWITCH.

Specification of Letters Patent.

Patented June 10, 191 3.

Application filed April 1, 1912. Serial No. 687,828.

To `f/Y/ wlw/n.- /e may concern.:

lle it known that I. HENRY R. GiLsoN, residing at Beaver. in the countyof Beaver and State oi'y Pennsylvania. a citizen of the linited Statee.have invented or discovered certain new and useful improvements inl'llectrical Hfvitches, ot which improvements the tollowinn is aSpecification.

ll is the object ot' theinvention to provide an electrical switch, whichshall be simple in construction and etiicient in operation; and by meansof which arcing of the current when the circuit is broken will beeffectively prevented.

ln the accompanying drawings the invention i5 illuetratcd in itspreferred form, and as embodied in a lamp-socket. V

Figure l a plan view of the Socket connected to a section ot' conduit;Fig. 2 is a sectional elevation on the line II-ll o' Figi'. 1; Fig. 5lie a cross-Sectional view on the line ille-lll ot Fig. 1; Figa is a planview ot the switch with the cap and shell ot the socket removed; Fig. 5is a cross-sectional view ot the Socket on the line V--V ot' Fig. `rt:and Fig. (i is. a detail view showiupthe keV-shaft in the oppositeposition to that Shown in Fig.

The insulatingr block 1 of the Socket is provided with the terminals 2and 3, and thtcoiulucting Shell kl is secured to the face ot the blockin the usual or any suitable manner. '.llie terminal 2 is provided withthe usual conducting strip 5 extending within the shell in position tomake contact with one terminal ot' the lamp, and insulated from theshell as by the mica disk rlhc other terminal ."3 is provided with theconducting resilient strip 7 adapted to inake and break contact with thebase ot the ehell -'t-, the shell, as is ueual, being adapted to makeContact with the other terminal ot the lamp when the latter ia in place.For making` and breaking contact. with the shell. the strip 7 is:preferably bent to torni a spring-arm 7 arranged in the lelot 8 in theblock 1 adjacent to the outer tace ot the base of the Shell. 0n theopposite side ot the springairni in the slot mounted a longitudinallyslidable key-Shaft or bar El, the said shaft being held within the slotbythe ASpring-arm. rlhe body of this shaft ie reduced in thickness,forming omweite Qhrnilrlm-Q 1n nml 11 amil lmewmm shaft a sliding dog 12having a range ot movement between the shoulders independently of theshaft. The dog 19. is provided with an extension 13. which may have aroller 14 as shown, in position to bear against the spring' arm 7a. Thespringarm 7a is bent or offset .as Shown, forming an incline 15 behindWhich the end of the dog rests when the spring-anni is out of Contactwith the lshell. The sidca of the dog may be. extend ed laterally beyondthe lines of the shaft 5i and move in a limited enlarged portion 16 ofthe slot 8, thus limiting the range ot' longitudinal movement of theshaft. The spr1ng-arm 7 may have a slight. depression 17 adjacent to theincline 15, whereby the spring-arm will be caused to bind upon the ridge13 of the dogg` 12 when the circuit is closed as presently to bedescribed.

Figs. 2 and 3 of the drawing Show the circuit open, the spring-arm 7being;` out of contact with the Shell 4, and the ridge 13 of dog 12resting behind the incline 15 on the spring-arm. In order to close thecircuit between the spring-arm and shell, the keyshatt t) is pushed tothe right, and the Shoulder 10 forces the dog l2 to the right also, thusranging,r its ridge 13 to torce the spring'- arm into contact with theShell, the edge ot the ridge then preferably resting` in the Smalldepression 1T as Shown in Fig. 6. ln order to break the circuit thekey-shaft is pushed to the left, and as Soon as the shoulder 1l hasforced the edge of the ridge 13 of the dog 1Q over thc edge ot' theincline l5, the Spring-arm will automatically snap the dog 1Q to theleft. iinleliendently ot the movement ot' the key-shat`t, thug quicklyand lsharply breaking` the circuit, and etlectively preventing arcing'.The constructor will of courge proportion the parte' so as to allowsuticient separation ot the spring:- arin from the shell.

ln the bane. ot the block l. is formed a slot 1H of prcper shape toreceive the conduit 1f). The block may he clamped to the ronduitI bymeans ot lerfreute: Ll) extending through the block and engaging asuitable plate 2l cn the opposite side ot the conduit'. The aocket maybe incased withina metallic cap 22, and in order to insulate the capVtrom the conduit the block l may be provided with a bead 23 interptsedbetween the edge t +L m... il... ...,i'. i' l l l/Vhile the invention isherein illustrated and described as embodied in a lamp-socket, it willof course be understood that it may be applied to the making andbreaking of' contact between any suitable switch-member orcircuit-controller and any member of' an electrical circuit.

I claim as my invention:

l. The combination with a fixed member of' an electrical circuit, of amovable circuit-controller having a bent away from said fixed member,and a movable key-ineinber provided with an independently movable dogadapted When the key-inember is moved in one direction to force saidcircuitcontroller into Contact with said fixed niember, and When thekey-member is moved in the opposite direction to yield to saidcircuit-controller and permit the latter to automatically break thecircuit.

rl`he combination with a fixed member of an electrical circuit, of aspring-arm circuit-controller arranged adjacent to Said fixed member,and a longitudinally movable key-shaft provided with a dog effectiveWhen the key-shaft is moved in one direction to force saidcircuit-controller into contact with the said fixed member, and when thekey-shaft is moved in the opposite direction to yield to saidcircuit-controller and arin circuit-controller arranged adjacent to saidfixed member and in one position completing a circuit therethrough, anda longitudinally movable key-Shaft provided ivitli .a dog effective whenthe key-sliat`t is moved in one direction to force said circuit-controller into one position with relation to said fixed member, and whenthe key shaft is moved in the opposite direction to yield to Saidcircuit-comulller and permit the latter to automatically move' to itsoppoaite po- `sition with relation to said fixed member.

4. The combination with a fixed member of an electrical circuit, of alongitudinally7 movable key-Shaft having a dog inovably mounted thereon,and a resilient contactarm arranged between the key-shaftv and fixedmember and in parallel relation with the key-shaft,l and provided withan incline in operative relation with said dog.

In testimony whereof I have hereunto set my hand.

HENRY R. GlLSON. Witnesses HARRY G. OsuRN, FRANCIS J. ToMAssoN.

